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The smooth-leaved elm is a deciduous tree that can grow to 35 m. Its Latin synonym carpinifolia alludes to the superficial similarity of the leaves to those of hornbeam Carpinus sp., while the common names contrast the smooth upper surface and narrowness of the leaves with those of the wych elm, which are rough and broad.
The Field Elm cultivar Ulmus minor 'Webbiana', or Webb's curly-leaf elm, [1] distinguished by its unusual leaves that fold upwards longitudinally, was said to have been raised at Lee's Nursery, Hammersmith, London, circa 1868, and was first described in that year in The Gardener's Chronicle [2] [3] and The Florist and Pomologist. [4]
The Field Elm cultivar Ulmus minor 'Atinia Variegata', the Variegated-leaved common English Elm, [1] formerly known as U. procera 'Argenteo-Variegata' [2] and described by Weston (1770) as U. campestris argenteo-variegata, [3] is believed to have originated in England in the seventeenth century [4] and to have been cultivated since the eighteenth. [2]
Ulmus castaneifolia Hemsley, [3] the chestnut-leafed elm or multinerved elm, is a small deciduous tree found across much of China in broadleaved forests at elevations of 500–1,600 metres (1,600–5,200 ft).
Henry described var. italica as a smooth-leaved field elm growing to 80 feet, distinguished by its 14 to 18 pairs of leaf-veins, an unusually high number for this species. Several Italian field elm authorities offering diagnostic leaf-photographs of local olmo campestre show leaves with 14 to 18 vein-pairs.
The American elm cultivar Ulmus americana 'American Liberty' is in fact a group of six genetically distinct cultivars under a single name, although they are superficially similar. [1] The Liberty elm is reportedly suitable for street planting, being tolerant of de-icing salts and air pollution.
[2] [3] The foliage emerges creamy-yellow in spring, [4] some leaves remaining pale later into the year. [5] The canopy turns rich yellow in the fall. [ 6 ] Descriptions of the cultivar's vigour and ultimate height vary from "a slow-growing shrub attaining no more than 8 ft (2.5 m)", [ 5 ] to "growing at a fast rate, to about 20 ft tall at ...
Emerald Sunshine is resistant to Dutch elm disease and Elm Yellows (Phloem necrosis). Foliage of trees under assessment at the aforementioned National elm trial site at U C Davis suffered minimal damage caused by the elm leaf beetle Xanthogaleruca luteola, [3] whilst damage caused by Japanese Beetle in trials at the University of Kentucky was found to be slight, owing to the dense pubescence ...